| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.851 | 0.357 | 2.031 | 3.893 |
| Arsenic | As (ppm) | 3.774 | 1.835 | 1.540 | 12.530 |
| Calcium | Ca (wt%) | 1.090 | 0.353 | 0.366 | 2.430 |
| Copper | Cu (ppm) | 6.360 | 1.572 | 4.134 | 11.924 |
| Iron | Fe (wt%) | 1.103 | 0.163 | 0.720 | 1.504 |
| Mercury | Hg (ppm) | 0.018 | 0.006 | 0.010 | 0.042 |
| Magnesium | Mg (wt%) | 0.330 | 0.142 | 0.189 | 1.109 |
| Manganese | Mn (ppm) | 214.168 | 39.853 | 108.100 | 338.817 |
| Sodium | Na (wt%) | 0.308 | 0.188 | 0.136 | 1.229 |
| Phosphorus | P (wt%) | 0.017 | 0.005 | 0.010 | 0.030 |
| Lead | Pb (ppm) | 12.061 | 3.806 | 5.009 | 25.633 |
| Selenium | Se (ppm) | 0.212 | 0.054 | 0.101 | 0.489 |
| Titanium | Ti (wt%) | 0.229 | 0.017 | 0.176 | 0.270 |
| Zinc | Zn (ppm) | 29.378 | 4.153 | 18.585 | 43.511 |